Hydraulic wrench



W. E. STUBBS HYDRAULIC WRENCH Aug. 8, 1950 Filed June l0, 1946 Patented ug. 8,1195() UNIT-ED STATES APATENT OFFICE HXDBAULIC WRENCH wiuiamnstbbs, -Bereamhio Application J une 10, 1946; SerialxNo. .675;785

. slolaims. (C1. 81;129)

This invention `relates .to unprovements In fewrenches y J,The, primary object of th is invention vis Athe provision.- of an improved hydraulic lwrench the parts .of which are compact/ly assembled toadmt of e'lcient adjustment of the jaws of Athe wrench" f .through a simple handleadjustment at the end of the wrench. v u

Other objects andfadvantages of theinvention y, description.

In the acc ornpanying=A drawing, forming a part .of this specication, and wherein similar reference characters designatecorresponding parts throughout the `several views,

Figure 1 is a plan view of `the wrench taken' from the jaw side thereof. Y y Figure 2 is a cross sectional View. taken longitudinally through the wrench.

Figure 3' isy an ..end View 'of the vwrench taken:

vfrornthe handle end.`

.Figure llis .an enlarged cross ysectional View 'taken substantially on'the'linelI--ll vof Figure 2. Inlthe accompanying drawing, wherein'for the 'purpose .ofi illustration issh'own only a preferre embodiment oftheinventionjthe letter Al may "gener'ally designate 'the wrench.-v .-Itmay'` include afsupporting body or casing-B having a fixed:v jaw-C thereon. f A Amo-vable`ja-w D=is A-profvideduponthe bodyfBfconnected-ftola plunger E. 3 .-opera-bly disposed" -with-n the-body-1B.- A Aliquidw is disposed" withinAv the bodyBand movable shy HfmeansFtmove the plungerback and forth #fand-likewise move-the awDwith-respectto the *The bodyefB: is preferably offany approved-maivterial.-v According to the-purposeA forgwhichfthe Ywrench is providedthe lengthmay vary, as .will "'1.bewellunderstood-by those skilled; in the art. AThe casing Bfincludes a handle portion 'LI Il. within sleeveflike-packing'. follower z omounted in.y `the passageway' l adlteyhansie end m of the body.

andthis sleeve "20 atits Vextreme` endv is screw threaded atLZI for screw threading inthe' screw l threaded end of thepassageway I'I. By threadlwill be apparent Y from the following detailedml to receivey athrustlcollaror cap 4l) which'is flangedt-oreceive a thrustwasher 4I between the ing theV follower 2U thepacking may be' clamped against the shoulder- I 6 and uponthesrnooth porf tion ofthe piston-adjusting rod which"'ex`tends along the passageway -i I and comprises" part "of the' means F.` f l A sleeve-like piston -2I`is threaded uponthe screw portion 21 ofthe rod 25, and isfrn'ovable in the passageway l Ilbetween the'packin'g. above described andthe jawfend of the casingo'r body. By turning the screw rod- 25 'the piston 26 maybe ymoved along the passageway' I I. j At the extreme end of the passageway II aremovable screw cap 39 .is'.p rovid ed, having a socket 3| to receive a reduced-step' bearing 32 on the end of the screw rod 25, as shown in Figure 2. The handleportion I0 at its extremeendis externallyscrew' threaded flange and the end ofithe handle I0, Th'escrew .w40 vwhichfaapassageway II is provided.' It ,extendsA substantially the fulllength of thebodyB. f Be- *rodi 25-isreduced= atits end. 42 which extends through the thrust-washer andthe c ap 4`0 this portion 42 is externally. screw threaded for `threadaloly receiving a knob `or wheel. 44 retained thereon Yby a nut 45. i Rotation of the wheel 44 will rotate the screw rod 25 and move the piston .baokandforth within the confines of the passageway llbetween the packing washer'l and the step bearing cap 30.

The piston ;26 maybel provided .with packing Aor piston rings 46'thereon, if so` desired. .To preythe packing washer 'I6 andthe cap 30.

In the chamber I3 ofthe extension portion I2 of the wrench body'is located-theslidable plunger E. This plunger E is of a desired length andfit fis provided with aV key pi 5D which transversely extends atgits ends beyond the sleeve I2 through slotsf52 provided therein and keys the-movable jaw"-D"to theplunger for-'movement with the course, f govern the degree ofr` movement -of the movable jaw with respect to the statinaryfja'w.

TheplungerE-if so desired, may be providedwith packing rings top'reventlleakof -fluid vfrom one way II with the passageway I3. Similarly at the opposite end of the plunger passageway I3 there is provided a duct 62 which communicates the passageway II immediately at the far side of the packing washer I6 with the plunger chamber I3. The extension I2 at the extreme end of the body may be provided with a Icap B which seals off the passageway I3. At the opposite end of the .passageway I3 the extension I2 may be provided with a ller cap II.

Any suitable liquid may be placed in the wrench. The passageway II and the chamber I3 at both sides of thepiston 26 and the plunger E are filled with the liquid, preferably without air space.-

It is quite obvious from the foregoing that in order to move the jaw D it is merely necessary to turn the wheel 44. This turns the rod 25 and feeds the piston 26 in the desired direction along the passageway I I. The liquid will pass through V the ducts 50and 62 and movethe plunger E and direction.

It will be noted from Figures 1 and 3 that the jaws are tapered so as to `permit their admission to places diiiicult of access.

Changes in details may be made to the form of invention herein shown and described without departing from the spiritvof the invention or the scope of the following claims.

I claim:

l. In a hydraulic wrench the combination of a supporting body including a handle, a stationary jaw upon the supporting body, a movable jaw upon the supporting body, said supporting body having a pair of chambers therein with transverse ducts communicatingthe chambers at opposite ends thereof, a piston slidable in one of the chambers between said ducts, means for moving said piston along said chamber from vexteriorly Y of the body, a plunger in the other chamber connected with the movable jaw for movement therewith, and a liquid in said chamber at opposite sides of the piston and plunger and movable through said ducts to move the jaw as the piston is moved along its chamber.

, l 2. In a Wrench structure the combination of an elongated supporting body having a liquid re- -ceiving passageway therealong, a stationary jaw j upon said body, a movable jaw mounted upon thel body for movement thereupon towards and -away from said stationary jaw, a plunger slidable in said passageway and connected with said mov- -able jaw, a liquid in said passageway at opposite sides of said plunger, and means for selectively pressing the liquid ateither end of the plunger within said passageway for varying the position of the plunger and its movable jaw withrespect to the stationary jaw.

3. In a wrench structure the combination of an elongated supporting body having a liquid receiving passageway therealong, a stationary jaw upon said body, a jaw movably mounted upon the body jfor movement thereupon towards and away from said stationary jaw, a plunger slidable in said passageway and xedly connected with said mov- -able jaw, a liquid in said passageway at opposite kthe stationary jaw, said last mentioned means comprising a piston, and screw means mounted 1 upon said body for adjusting the position of said .Pistoll-l .i i. -Y

4. In a hydraulic wrench the combination of an elongated supporting body having a pair of compartments therein, duct means communicating said compartments at remote positions, a stationary jaw upon the body, a movable jaw upon the body, a plunger in one of the compartments between the duct means above mentioned, a slidable piston in the other compartments between the duct means above mentioned, a liquid in said compartments filling the ends thereof at opposite ends of the plunger and piston, and means for moving the piston for displacing the liquid and mcving the plunger and the movable jaw therewi h.

5. In a wrench structure the combination of a supporting body having chamber means therein, a stationary jaw upon the body, a movable jaw upon the body, a plunger connected with the movable jaw movable along the chamber means, a piston in the chamber means, a liquid in the chamber means at opposite ends of the plunger and piston, said body having duct means -communicating the chamber means beyond-similar ends of said piston and said plunger; and means for moving the piston for displacing the liquid and moving the plunger and the movable jaw therewith.

6. In a hydraulic wrench the combination of a supporting casing having a passageway therealong, a piston slidable in said passageway, means to prevent rotation of the piston, an elongated screw rotatably supported by the body supporting casing and threaded in the pistonl for moving vthe piston along the passageway upon rotation of the screw, a stationary jaw upon the casing, a movable jaw slidable along the casing, a liquid in the passageway at opposite sides of said piston, and means connected with the movable jaw and operable in said casing while being acted upon by the displacement of the liquid as an incident of movement of the piston, to move the movable Jaw.

7. In a hydraulic wrench the combination of an elongated supporting body having a pair of substantially parallel compartments therealong, one of which is longer than the other, a stationaryfjaw mounted upon oneend of said body, a movable 'jaw slidably mounted upon saidl vbody andencompassing both of said compartments, a plunger slidable in the shorter of said compartments iixedly connected with the movable jaw,' a .piston slidably movable along the longer compartment.

i said compartments having duct communication at opposite ends thereof and at opposite sides of EISV the piston and plunger locations, a liquidjnsaid compartments filling both ends thereof at opposite sides of the plunger and piston, a rotatable screw rod having screw threads thereon threadably engaging said piston for moving the piston along its compartment upon rotation of said rod. said rod being axially disposed in the longer of said compartments and having an operating head projecting at the end of the body opposite the stationary jaw.

8. In a hydraulic wrench structure the combination of an elongated casing having a pair of substantiallyparallel compartments therein, said casing at oneend providing a handle and at its opposite endu having a laterally extending stationary jaw, a movable jaw mounted upon said casing complementary-to the stationary jaw; a plunger slidable in one of said compartments xeclly connected to the movable jaw for movement therewith, a piston slidable in the other compartment, liquid in both of'V said compartments at the opposite ends of the piston and plunger, said compartments having `communication With each other beyond both ends of the plunger and piston, and means mounted upon said casing for moving said piston and compressing the liquid for oper- 5 ating the plunger and the movable jaw therewith.

WILLIAM E. STUBBS.

REFERENCES CITED Number 6 UNITED STATES PATENTS Name Date Bright Apr. 16, 1907 Reynolds July 2, 1918 Weiss May 19, 1931 Lewis Feb. 28, 1935 Denny Oct. 19, 1937 FOREIGN PATENTS Country Date The following references are` of record in the 10 Number file of this patent:

France Oct. 19, 1936 

